3.75 oz mixed with ice, 1.12 oz of it pure alcohol
Melt
Shaken: +20 % of the pre-batch, +0.75 oz of water
Served
3.75 + 0.75 = 4.5 oz in the glass
Strength
1.12 ÷ 4.5 = 25.0 % ABV as served
Ethanol
1.12 oz × 29.57 ml × 0.789 g/ml = 26 g · about 184 kcal from the alcohol alone
IN THE GLASS
GUAIACOL
FROM MEZCAL · the smoky phenolic note
Formula
C₇H₈O₂
Mass
124.14 g/mol
IUPAC
2-methoxyphenol
The smoke molecule. In peated scotch from burning peat over the malted barley; in mezcal from the underground roasting pit; in barbecue, smoked paprika, and bonfires. One molecule covering campfire, Islay whisky, and good carnitas. The brain files all three under "fire."
Lemon's defining note: technically a mix of two geometric isomers (geranial and neral) that read as the same aroma to the nose. Lemon peel, lemongrass, lemon verbena, and Indian chai all carry it. In cocktails it's what a lemon twist contributes that lemon juice can't: the volatile expressed from the oil glands, not the acid from the pulp.
An orange rind, squeezed, throws a spray that catches the light. That's d-limonene boiling off. It's roughly 95% of orange peel oil by mass, and the molecule that puts the "orange" in orange anything. Used industrially as a green solvent because the chemistry that dissolves citrus oils also dissolves greasy machinery. The expressed-peel garnish on a cocktail is delivering vaporized limonene to the rim of the glass.